When using a shared database for platform instances then I am unable to start two server instances at the same time. I must wait till the first instance finished starting then I can start the second instance.
During the initialization of a clean database it may happen that juddi 2 tries to insert data about the "root" publisher but the data is already there. The was inserted by juddi 1. If this happens then we get a ConstraintViolationException as can be seen in the attached log.